CN103680410B - Based on the touch-control display drive method of AMOLED - Google Patents

Based on the touch-control display drive method of AMOLED Download PDF

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Publication number
CN103680410B
CN103680410B CN201310718075.9A CN201310718075A CN103680410B CN 103680410 B CN103680410 B CN 103680410B CN 201310718075 A CN201310718075 A CN 201310718075A CN 103680410 B CN103680410 B CN 103680410B
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touch
stage
display
power signal
control
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CN103680410A (en
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马占洁
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BOE Technology Group Co Ltd
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BOE Technology Group Co Ltd
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Priority to US14/418,137 priority patent/US9666122B2/en
Priority to PCT/CN2014/078025 priority patent/WO2015096364A1/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0819—Several active elements per pixel in active matrix panels used for counteracting undesired variations, e.g. feedback or autozeroing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G09G2300/0861—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0202—Addressing of scan or signal lines
    • G09G2310/0218—Addressing of scan or signal lines with collection of electrodes in groups for n-dimensional addressing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery

Abstract

The present invention relates to display technique field, disclose a kind of touch-control display drive method based on AMOLED, when driving display, the one-period of driver' s timing is divided into former and later two stages: display stage and touch-control sensing stage, in the described display stage, one direct current signal is applied to all power signal lines, in the described touch-control sensing stage, all power signal lines are divided into two groups, first group of power signal line and second source signal wire, and described first group of power signal line and second source signal wire are distributed on the substrate of AMOLED mutual vertically, one pulse signal is applied to first group of power signal line, the position of touch point is determined in change when touching by detecting second group of power signal line.Driver' s timing is divided into display and touch-control stage by the present invention, original VDD signal wire is utilized to carry out touch-control sensing and locate in the touch-control stage, thus do not cause in any technique to dot structure, spatially carry out any change, thus reduce thickness and the cost of manufacture of display device.

Description

Based on the touch-control display drive method of AMOLED
Technical field
The present invention relates to display technique field, particularly a kind of touch-control display drive method based on AMOLED.
Background technology
In recent years, touch display technique development rapidly, in order to improve the reliability of product, reducing costs, realizing better transmittance, the thickness of thinning whole screen and weight etc., touch screen technology turned to embedded by external hanging type gradually.Embedded Touch Screen is exactly in the process of production flat pannel display, produces touch screen function, reaches the optimization of function, effect and cost.
Touch-control (incelltouch) technology in current major part design box, and what be applied to product is all design for the pixel structure of LCD.At present about AMOLED (active-matrix organic light emitting diode (AMOLED) panel, ActiveMatrixOrganicLightEmittingDiode) touch-control in inEcelltouch(panel) scheme be mainly used in bottom emitting type organic light emitting diode display, at TFT(thin film transistor (TFT), ThinFilmTransistor) backboard is formed projecting type capacitor structure, namely additionally on original display structure basis one deck touch-control structure is added, because this increasing thickness and the cost of manufacture of display device.
Summary of the invention
(1) technical matters that will solve
The technical problem to be solved in the present invention is: how on the original dot structure of AMOLED display device, to realize touch-control sensing.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides a kind of touch-control display drive method based on AMOLED, when driving display, the one-period of driver' s timing is divided into former and later two stages: display stage and touch-control sensing stage, in the described display stage, one direct current signal is applied to all power signal lines, in the described touch-control sensing stage, all power signal lines are divided into two groups, first group of power signal line and second source signal wire, and described first group of power signal line and second source signal wire are distributed on the substrate of AMOLED mutual vertically, one pulse signal is applied to first group of power signal line, the position of touch point is determined in change when touching by detecting second group of power signal line.
Wherein, the one-period of described driver' s timing is a frame, and a frame is divided into former and later two stages: described display stage and described touch-control sensing stage.
Wherein, the duration in described display stage is greater than the duration in described touch-control sensing stage.
Wherein, the one-period of described driver' s timing comprises N frame, and N frame is divided into former and later two time periods: first time period and the second time period, the first time period in front N-1 frame and N frame be the described display stage, second time period of N frame is the described touch-control sensing stage, N >=2.
Wherein, the duration of described first time period is greater than the duration of described second time period.
Wherein, respective in first group of power signal line described in two adjacent groups and second group of power signal line signal wire quantity is equal.
(3) beneficial effect
Driver' s timing is divided into display and touch-control stage by the present invention, original VDD signal wire is utilized to carry out touch-control sensing and locate in the touch-control stage, thus do not cause in any technique to dot structure, spatially carry out any change, thus reduce thickness and the cost of manufacture of display device.
Accompanying drawing explanation
Fig. 1 is the planar structure schematic diagram of contact panel;
Fig. 2 a is existing a kind of equivalent circuit diagram with the AMOLED dot structure of VDDIRDrop compensate function;
Fig. 2 b is the circuit diagram after the dot structure of Fig. 2 a divides according to the function that touch controllable function principle is carried out;
Fig. 3 is the touch-control sensing schematic diagram of the inventive method;
Fig. 4 is the touch-control display drive method sequential chart based on AMOLED of the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
Utilize of existing AMOLED display arranges power signal line VDD (supply voltage, VoltageDrainDrain) to IRDrop(resistance drop more) compensate, its concrete principle is as follows:
As shown in Fig. 2 a and Fig. 4, the work of the equivalent electrical circuit (so thin film transistor (TFT) is P type) of the dot structure that the embodiment of the present invention provides comprises two stages: signal loading stage 1 and glow phase 2.
In the signal loading stage 1, image frame data signal source V dATAwhen starting to export current frame data signal, transmiting signal source EMISSION becomes output high pressure shutdown signal from exporting low-pressure opening signal, and switching transistor T2, switching transistor T3 and switching transistor T7 are turned off; Reset signal source V rESETbecome output low-pressure opening signal control reset transistor T4 from output high pressure shutdown signal and become opening from off state, so that the voltage amplitude of the one end be connected with the source electrode of reset transistor T4 by memory capacitance C1 is to GND; Gate signal source V gATEbecome output low-pressure opening signal from output high pressure shutdown signal and become opening with gauge tap transistor T5 and switching transistor T6 from off state, p-type driving transistors T1 can be connected into a diode by the unlatching of switching transistor T6, and the unlatching of switching transistor T5 can make image frame data signal source V dATAthe current frame data signal exported arrives one end that memory capacitance C1 is connected with the grid of p-type driving transistors T1, and namely the voltage of this one end of memory capacitance C1 is V dATA+ V th1.
In glow phase 2, reset signal source V rESETwith gate signal source V gATEall become from output low-pressure opening signal and export high pressure shutdown signal, transmiting signal source V eMISSIONbecome from output high pressure shutdown signal and export low-pressure opening signal, become opening with gauge tap transistor T2, switching transistor T3 and switching transistor T7 from off state; Switching transistor T7 opens the voltage V of the signal that power signal line VDD can be made to export 1arrive one end that memory capacitance C1 is connected with the drain electrode of switching transistor T7, namely the voltage of this one end of memory capacitance C1 is by transmiting signal source V eMISSIONv is become from GND when exporting high pressure shutdown signal 1, thus make the grid voltage of p-type driving transistors T1 by transmiting signal source V eMISSIONby V during output high pressure shutdown signal dATA+ V th1become V dATA+ V th1+ V 1; The voltage V of the signal that the unlatching of switching transistor T2 can make power signal line export 1arrive the source electrode of p-type driving transistors T1; The unlatching of switching transistor T3 can make p-type driving transistors T1 at its grid voltage V dATA+ V th1+ V 1with source voltage V 1acting in conjunction under the drain current that produces can arrive the anode of OLEDD1, and luminous with the common driving OLED D1 of VSS.
In this image element circuit, because memory capacitance C1 is at image frame data signal source V dATAwhen stopping exporting current frame data signal, storage voltage size equals V dATA+ V th1+ V 1voltage signal, and be connected with the grid of p-type driving transistors T1 due to memory capacitance C1, namely the voltage of the grid of p-type driving transistors T1 is also V dATA+ V th1+ V 1, and now the source voltage of p-type driving transistors T1 is V 1.
Because p-type driving transistors T1 is now operated in saturation region, be operated in the grid of p-type driving transistors T1 and the voltage difference V of source electrode of saturation region gS=V dATA+ V th1+ V 1-V 1=V dATA+ V th1, according to transistor in following prior art at the formula of the current characteristics of saturation region the drain current calculating p-type driving transistors T1 can be calculated:
i D = K 2 ( V DATA + V th 1 - V th 1 ) 2 = K 2 ( V DATA ) 2 .
Wherein, K is the current coefficient of transistor;
μ, C oX, W, L be respectively the field-effect mobility of transistor, gate insulator unit-area capacitance, channel width, length; In identical structure, the value of K is relatively stable;
I dfor the drain current of transistor;
V gSfor the grid of transistor and the voltage difference of source electrode;
V thfor the threshold voltage of transistor.
Due to the source voltage V of p-type driving transistors T1 1counteract V in its grid voltage 1part, the threshold voltage V of p-type driving transistors T1 th1counteract V in its grid voltage th1part, therefore, the drain current of p-type driving transistors T1 and its threshold voltage V th1and the voltage V of the signal of power signal line VDD 1size has nothing to do.
Because the electric current and VDD signal that flow through AMOLED have nothing to do, the change of such VDD signal, can not impact the display of AMOLED.So just, the combination of the power signal line (VDD signal wire) of different line number or columns can be utilized, form Difference row orientation and row to VDD signal wire unit, the VDD signal of this little unit all can be linked to be same signal VDD in the display stage and keep normal display; In the touch-control stage, the VDD signal of these unit independently can provide the touching signals of Dx/Ry, realizes touch-control positioning function.
Based on above-mentioned principle, the embodiment of the present invention based in the touch-control display drive method of AMOLED, when driving display, the one-period of driver' s timing is divided into former and later two stages: display stage and touch-control sensing stage, in the described display stage, one direct current signal is applied to all power signal lines (VDD signal wire).In the described touch-control sensing stage, all power signal lines are divided into two groups of (divisions in logic, in structure and unchanged), first group of power signal line and second source signal wire, and make described first group of power signal line and second source signal wire be distributed on the substrate of AMOLED, can be preferably orthogonal two groups of power signal lines, to determine the coordinate of touch point.One pulse signal (Dx) is applied to first group of power signal line, is determined the position of touch point when touching by the change of the signal (Ry) of detection second group of power signal line.Namely first group of power signal line is equivalent to drive singal electrode (drive electrode), and second group of power signal line is equivalent to Received signal strength electrode (induction electrode).
In the present embodiment, the mode one-period of driver' s timing being divided into former and later two stages comprises following two kinds of modes:
Mode one: the one-period of driver' s timing can be a frame, and a frame is divided into former and later two stages, namely above-mentioned display stage and touch-control sensing stage.In order to not affect display effect, ensure the continuity of display, the duration in display stage is greater than the duration in touch-control sensing stage.
Mode two: the one-period of described driver' s timing can also comprise N frame, N frame is divided into former and later two time periods: first time period and the second time period, first time period in front N-1 frame and N frame be the above-mentioned display stage, second time period of N frame is the above-mentioned touch-control sensing stage, N >=2.Wherein, the duration of first time period is greater than the duration of the second time period.
In the second dividing mode, the continuity of display effect is stronger.
Wherein, respective in first group of power signal line described in two adjacent groups and second group of power signal line signal wire quantity is equal.Make each drive singal electrode and induced signal electrode to be uniformly distributed like this, touch-control is located more accurate.
The dot structure with VDDIRDrop compensate function quoted in the present invention and the touch technology realized, dot structure described in the more than this programme of pixel designed by it, every dot structure with this function, all can design the incelltouch touch technology of this mode according to this theory.
In method of the present invention, driver' s timing is divided into display and touch-control stage, original VDD signal wire is utilized to carry out touch-control sensing and locate in the touch-control stage, thus do not cause in any technique to dot structure, spatially carry out any change, thus reduce thickness and the cost of manufacture of display device.
Introduce below quote in the present embodiment there is the Technology Integration and principle of work thereof how VDDIRDrop compensate function dot structure to carry out carrying out with incelltouch.
Fig. 1 is the plane structure chart of contact panel, can find out contact panel be divided into the Dx that sends drive singal to, and for receiving drive singal, and its Received signal strength whether political reform occurs of perception is to Ry.Wherein Dx to Ry to each cellular construction according to different situations, one or more pixel cell (pixel cell as shown in Figure 2 a) can be comprised.In different pixels structure, if connect and need wire jumper, as between Dx touch control unit horizontal in Fig. 1, be spaced the vertical touch control unit of a Ry, such Dx touch control unit connect just need with traditional metal with (or) active layer of ion doping is connected as wire jumper.
The function that the dot structure of Fig. 2 a carries out according to touch controllable function principle divides by Fig. 2 b, this dot structure can be divided into two parts, left half VDD(signal wire)/T7(thin film transistor (TFT))/C1(memory capacitance) three parts formations, right half is connected and composed by other devices remaining and circuit, here just with a building block box instead, to simplify.In fig. 2 a, can find out that power signal line VDD plays not same-action in different phase.At display stage VDD as a DC signal source, provide voltage signal to image element circuit, so that driving OLED is luminous; And in the touch-control stage, VDD signal wire is divided into again two parts, a part is as the drive singal end Dx of touching signals, and another part carries out as the receiving end Ry of touching signals the signal responding to self-driven signal end Ry.And becoming pulse signal as the signal of drive singal end Dx in the touch-control stage, this signal is by the coupling capacitance C between Dx and Ry dx_Ry(cross-coupling capacitance), as shown in Figure 3, passes to receiving end Ry by pulse signal, make it also occur the pulse signal consistent with Dx, and have regulation amplitude.If work as exterior object, such as, during finger contact AMOLED display panel, just occur shown in Fig. 3 with the touch control capacitance C be coupled between Dx and Ry f_Dxand C f_Ry, due to the impact of this touch-control coupling capacitance, will C be caused dx_Rybetween the redistribution of discharge and recharge, cause the potential voltage of Received signal strength end Ry to change, this change is just fed back to touch-control IC by Ry line, is oriented the position of touch of finger, realize touch control detection function by IC logical algorithm.
Fig. 3 shows mutual tolerance principle to be the schematic diagram realizing touch control, and certain the present invention is also by realizing touch control from holding principle, and namely each VDD signal wire is both as drive end, again as induction end, only need adopt corresponding self-tolerant touch-control IC.
Fig. 4 is the signal timing diagram of this type display/contact panel, as can be seen from the present embodiment figure, every frame signal of AMOLED is divided into two stages, and a stage is the display stage, display stage power supply signal VDD be direct current signal, and in this frame often go VDD signal identical; In the final stage of every frame, or show the final stage of last frame of a few frame, can touching signals be sent, namely carry out the touch-control stage.In the touch-control stage, under the condition that other signals are all constant, only VDD signal is become a pulse signal, the employing square wave type pulse signal in the present embodiment, but the pulse signal of other types is applicable equally.This pulse signal sends according to the Dx signal wire of various combination unit simultaneously, and the VDD signal forming each row Ry of receiving element keeps identical with the display stage constant, or other direct current signal.Being connected of the touching signals line Dx/Ry that each row respectively arranges can connect in each pixel inside, also can in wiring area, periphery, viewing area, and the identical signal wire of each unit links together.
In the touch-control stage because EMISSION signal is in low-pressure opening state (because the thin film transistor (TFT) in the present embodiment is all P type structures) always, such thin film transistor (TFT) T7 is in opening always, power supply signal VDD is connected with memory capacitance end always, because the power signal line area of memory capacitance end is relatively large, make the electrode tip that power signal line is suitable for as touch control capacitance like this, to improve the precision of touch-control.
In the present invention, original display timing generator be divide into display stage and touch-control stage, extra touch control electrode is not increased to existing dot structure.How the method for touch point is located similarly to the prior art for the touch-control stage, repeats no more herein.
Above embodiment is only for illustration of the present invention; and be not limitation of the present invention; the those of ordinary skill of relevant technical field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all equivalent technical schemes also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.

Claims (5)

1. the touch-control display drive method based on AMOLED, it is characterized in that, when driving display, the one-period of driver' s timing is divided into former and later two stages: display stage and touch-control sensing stage, in the described display stage, one direct current signal is applied to all power signal lines, in the described touch-control sensing stage, all power signal lines are logically divided into two groups, first group of power signal line and second source signal wire, and described first group of power signal line and second source signal wire are distributed on the substrate of AMOLED mutual vertically, one pulse signal is applied to first group of power signal line, the position of touch point is determined when touching by the change of the signal detecting second group of power signal line,
The one-period of described driver' s timing comprises N frame, N frame is divided into former and later two time periods: first time period and the second time period, first time period in front N-1 frame and N frame is the described display stage, and the second time period of N frame is the described touch-control sensing stage, N >=2.
2., as claimed in claim 1 based on the touch-control display drive method of AMOLED, it is characterized in that, the one-period of described driver' s timing is a frame, and a frame is divided into former and later two stages: described display stage and described touch-control sensing stage.
3., as claimed in claim 2 based on the touch-control display drive method of AMOLED, it is characterized in that, the duration in described display stage is greater than the duration in described touch-control sensing stage.
4., as claimed in claim 1 based on the touch-control display drive method of AMOLED, it is characterized in that, the duration of described first time period is greater than the duration of described second time period.
5. the touch-control display drive method based on AMOLED according to any one of Claims 1 to 4, is characterized in that, signal wire quantity respective in first group of power signal line described in two adjacent groups and second group of power signal line is equal.
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